Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71938 ACD/HCP4AH1

71938 ACD/HCP4AH1

Dimensions

d		190	mm
D		260	mm
B		33	mm
d₁		211.6	mm
d₂		211.6	mm
D₁		238.4	mm
K		0.6	mm
C₁		8.6	mm
r_1,2	min.	2	mm
r_3,4	min.	1	mm
a		69.2	mm

Abutment dimensions

d_a	min.	199	mm
d_b	min.	199	mm
D_a	max.	251	mm
D_b	max.	255	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		217.4	mm

Calculation data

Basic dynamic load rating	C	163	kN
Basic static load rating	C₀	208	kN
Fatigue load limit	P_u	5.85	kN
Attainable speed for grease lubrication		5300	r/min
Attainable speed for oil-air lubrication		8000	r/min
Ball diameter	D_w	22.225	mm
Number of balls	z	28
Reference grease quantity	G_ref	57	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	1000	N
Static axial stiffness, preload class A		505	N/µm
Preload class B	G_B	2000	N
Static axial stiffness, preload class B		665	N/µm
Preload class C	G_C	4000	N
Static axial stiffness, preload class C		886	N/µm
Preload class D	G_D	8000	N
Static axial stiffness, preload class D		1210	N/µm
Calculation factors
Calculation factor	f	1.27
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.17
Calculation factor	f_HC	1.04
Calculation factor	e	0.68
Calculation factor (single, tandem)	Y₂	0.87
Calculation factor (single, tandem)	Y₀	0.38
Calculation factor (single, tandem)	X₂	0.41
Calculation factor (back-to-back, face-to-face)	Y₁	0.92
Calculation factor (back-to-back, face-to-face)	Y₂	1.41
Calculation factor (back-to-back, face-to-face)	Y₀	0.76
Calculation factor (back-to-back, face-to-face)	X₂	0.67

Mass

Mass bearing

3.64

Model Number: 71938 ACD/HCP4AH1
Inner Diameter：190mm Outer Diameter：260mm Width：33mm
Reference speed:- Limiting speed:-
Type：Bearings, units and housings Super-precision bearings Angular contact ball bearings Angular contact ball bearings, super-precision
Details： Angular contact ball bearings, super-precision
Update date：2026-06-24
Application:horizontal processing,floor industry,atomizer class,insect experimental analysis instrument,Pneumatic Actuator,Spectrum Products,lifting tackle,electric pump,switch,car,motor
Similar models:71938 ACD/P4A 71938 CD/HCP4A 71938 ACD/HCP4AH1 71938 ACD/HCP4A 71938 CD/P4A 71938 CD/HCP4AH1
BEARING POWER International Trading Co.,Ltd. specialize in 71938ACD/HCP4AH1 products，there is large inventory of SKF 71938 ACD/HCP4AH1 Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71938 ACD/HCP4AH1 Which SKF 71938ACD/HCP4AH1 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.
Model No. Inner Diameter Outer Diameter Width Type

1650580
D/W R4-2RZ
NCF 18/950 V
NKX 50
NU 2212 ECJ

Purchase the SKF 71938 ACD/HCP4AH1 Please fill in the following

Hot number： 105x135x12 CRWA1 R 22205 E 34x44x8 HMSA10 V 7010 CD/HCP4A AOH 24188 AOH 3052 FYAWK 510 L HN 1210 IR 95x105x36 LS 2542 MBL 26 NUB 222 ECJ SAF 22618 T SAF 23044 KAT x 7.7/8 SI 35 ES-2RS

Model No.	Inner Diameter	Outer Diameter	Width	Type
1650580
D/W R4-2RZ
NCF 18/950 V
NKX 50
NU 2212 ECJ